Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/84—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising combined with mechanical treatment
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
  • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
  • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
  • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
  • G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
  • G06K19/07309—Means for preventing undesired reading or writing from or onto record carriers
  • G06K19/07318—Means for preventing undesired reading or writing from or onto record carriers by hindering electromagnetic reading or writing
  • G06K19/07327—Passive means, e.g. Faraday cages
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/16—Synthetic fibres, other than mineral fibres
  • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M2101/32—Polyesters

Definitions

• the technical solution relates to a textile for the protection of electronic information carriers which contains metal.
• radio broadcasting with specific power and on specific frequencies is used.
• An effective defence against unauthorized access to information on data carriers is provided by approaches based on the use of the Faraday cage principle, i.e. creating a barrier preventing the passage of electromagnetic radiation, i.e. including radio broadcasting.
• the goal of the technical solution is to eliminate or at least to minimize the drawbacks of the background art, especially to develop a material having an adequate protective function, yet with low sensitivity to repeated deformations, low stiffness and high elasticity, which could be further processed by conventional textile manufacturing methods such as gluing, lamination, layering, sewing, etc.
• a textile for the protection of electronic information carriers whose principle consists in that it is formed by a planar and smooth composite non-woven textile whose fibrous part is made of synthetic fibres which are provided with a metal surface coating.
• the textile thus produced can be attached by conventional textile techniques to other textile layers or between textile layers, typically by gluing or using polymeric interlayers or by lamination using a flexible matrix, etc.
• the composite non-woven textile itself which is a functional element of the future product, exhibits very high air permeability (breathability), as well as uniquely low bending stiffness. These two important characteristics predetermine the suitability of the composite non-woven textile according to this technical solution for layering with other textiles which provide the composite non-woven textile with a protective function and ensure the desired visual effect of the resulting article. It is clear from the above that the functional layer according to the present technical solution does not in any way reduce both the flexibility and the transport characteristics of the entire resulting textile sandwich from which the final article is produced.
• the shielding effectiveness of the textile according to this technical solution reaches more than 45 dB for electromagnetic radiation in a sufficiently wide range of frequencies of 30 MHz to 20 GHz, the electromagnetic shielding effectiveness being constant over the entire frequency range.
• the textile thus produced can be used for producing cases for credit cards and other contactless information carriers, passports, identity cards, and for producing packages for electronic devices, cases for personal documents, etc.
• Fig. 1 shows comparison of the air permeability of the composite non-woven textile (PES/Cu) according to this solution with conventional textiles (T), knitted textiles (P) and polyester textiles coated with a layer of conductive polymer (PES/Cu)
• Fig. 2 shows comparison of bending stiffness of the composite non-woven textile (PES/Cu) according to this technical solution with conventional textiles (T) and polyester textiles coated with a layer of conductive polymer (PES/Cu)
• Fig. 3 illustrates electromagnetic shielding effectiveness of the composite non-woven textile (PES/Cu)/Cu) according to this solution depending on the frequency of electromagnetic radiation - evaluated according to ASTM 4935-10 standard
• Fig. 1 shows comparison of the air permeability of the composite non-woven textile (PES/Cu) according to this solution with conventional textiles (T), knitted textiles (P) and polyester textiles coated with a layer of conductive polymer (PES/Cu)
• Fig. 2 shows comparison of bending stiffness of the composite non-
• Fig. 5 is an example of the preparation of a textile sandwich comprising the composite non-woven textile according to the present technical solution as a functional element. Examples of embodiment of the technical solution
• the textile according to the technical solution is essentially a composite non-woven textile, wherein the fibrous part of the composite is made from synthetic fibres which are coated with a metal surface coating to form the resulting composite.
• the surface of the non-woven textile Prior to applying the metal coating, the surface of the non-woven textile undergoes treatment to make it flat and smooth, e.g., calendering, pressing, etc., since the flatness and smoothness of the surface reduces the occurrence of undesirable interference of electromagnetic waves on the surface of the textile fibres after the textile has been coated with the metal layer.
• treatment e.g., calendering, pressing, etc.
• the material used for the non-woven textile as a raw material is preferably polyester, alternatively also natural materials can be used.
• the basis weight of the non-woven textile for the purpose of this technical solution is in the range of 5 g/m 2 to 60 g/m 2 and the thickness of the non-woven textile made for the purpose of this technical solution ranges from 50 ⁇ to 200 ⁇ .
• a chemical metal coating is applied to the textile fibres, for example silver, copper or tin, or at least two metals are applied simultaneously or sequentially.
• the preferred metal for coating is copper, which exhibits excellent shielding capability and mechanical bending strength, and last but not least, it has a favourable price.
• Other metals can be used as metals to provide corrosion resistance to copper. Applying a surface metal coating to the textile fibres, especially silver, copper and tin, is carried out by using appropriate techniques, e.g., some of the generally known chemical processes using autocatalytic methods.
• the metal to be applied has a character of a sub-micron layer which envelops only the textile fibres (not forming metal surfaces between the fibres), which results in a significant increase in electrical conductivity accompanied by a considerable increase in the ability of the material to shield the electromagnetic field, while not affecting the basic textile characteristics of the textile according to the technical solution, such as the transport characteristics (air and water vapour permeability at least 1000 lm "2 .s at an air pressure of 100 Pa and a bending stiffness (flexibility) of up to 0.5.10- 7 Nm 2 ).
• the metal content (predominantly copper) expressed in g.m “2 of the textile is preferably in the range of 2 g.m “2 to 20 g.m “2 , more preferably in the range of 5 g.m “2 to 10 g.m “2 , which allow to achieve the shielding effectiveness of the textile at a level more than 45 dB with an absolutely constant value in the entire range of electromagnetic radiation frequencies used (30 MHz to 20 GHz), as shown in Figure 3.
• the textile according to this technical solution thus forms a composite non-woven textile which is intended to be incorporated into the resultant article, preferably being protected on both sides by at least one other textile or non- textile layer, such as textile, knitted textile, non-woven textile, leather, artificial leather, foil, etc., these other layers being connected pointwise or in another manner, for example by gluing, sewing, etc.
• other textile or non- textile layer such as textile, knitted textile, non-woven textile, leather, artificial leather, foil, etc.
• a protective textile case for a contactless credit card 3 is made by using conventional textile technologies, whereby the credit card 3 case preferably covers the entire surface of the protected credit card 3 or at least that part in which the contactless communication antenna of the contactless credit card 3 is located. It is obvious that the example of a credit card case is only illustrative and that the technical solution makes it possible to create effective protective cases and packages of different sizes, shapes, processing complexity, etc.
• the technical solution is applicable for production of protective means for electronic information carriers, such as credit cards, identity cards, passports, electronic devices (mobile phones, tablets, laptops), etc., to protect them against unauthorized access and reading the information stored therein.
• electronic information carriers such as credit cards, identity cards, passports, electronic devices (mobile phones, tablets, laptops), etc.

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• Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Textile Engineering (AREA)
• Physics & Mathematics (AREA)
• General Engineering & Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Electromagnetism (AREA)
• Microelectronics & Electronic Packaging (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Power Engineering (AREA)
• Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
• Laminated Bodies (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Credit Cards Or The Like (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (3)

Families Citing this family (1)

Citations (5)

Family Cites Families (1)

• 2017
  • 2017-10-13 CZ CZ2017-34209U patent/CZ31290U1/cs active Protection Beyond IP Right Term
• 2018
  • 2018-10-10 WO PCT/CZ2018/050052 patent/WO2019072322A1/en not_active Ceased
  • 2018-10-10 EP EP18808206.9A patent/EP3695047A1/en active Pending

Patent Citations (5)

Non-Patent Citations (3)

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